System Info for Linux

Camera_control.py

Manual USB camera settings in Linux
https://www.kurokesu.com/main/2016/01/16/manual-usb-camera-settings-in-linux/
  
uvcdynctrl libwebcam command line tool
http://www.linux-commands-examples.com/uvcdynctrl
  

Libre_Office.txt

How to add space in TexMaths equation
https://ask.libreoffice.org/en/question/209748/how-to-add-space-in-texmaths-equation/

Linux_Info_Online.txt

50 UNIX / Linux Sysadmin Tutorials
https://www.thegeekstuff.com/2010/12/50-unix-linux-sysadmin-tutorials/

50 Most Frequently Used UNIX / Linux Commands (With Examples)
https://www.thegeekstuff.com/2010/11/50-linux-commands/

7 Linux hwclock Command Examples to Set Hardware Clock Date Time
https://www.thegeekstuff.com/2013/08/hwclock-examples/

Full reset of network interface
https://superuser.com/questions/885760/full-reset-of-network-interface

Error message “sudo: unable to resolve host (none)”
https://askubuntu.com/questions/59458/error-message-sudo-unable-to-resolve-host-none

https://crontab-generator.org/

Raspberry_Pi.txt

PiShrink
https://github.com/Drewsif/PiShrink

IP Address
https://www.raspberrypi.org/documentation/remote-access/ip-address.md

SSH using Linux or Mac OS
https://www.raspberrypi.org/documentation/remote-access/ssh/unix.md

SSH (Secure Shell)
https://www.raspberrypi.org/documentation/remote-access/ssh/

Linux commands
https://www.raspberrypi.org/documentation/linux/usage/commands.md

20 Handy Raspberry Pi Terminal Commands for Beginners 
https://www.lifewire.com/raspberry-pi-terminal-commands-4054108

42 of the Most Useful Raspberry Pi Commands
https://www.circuitbasics.com/useful-raspberry-pi-commands/

SD card cloning using the dd command
https://askubuntu.com/questions/227924/sd-card-cloning-using-the-dd-command

Clone Micro SD Card [Raspberry Pi, Linux, dd]
https://www.cyberpunk.rs/clone-micro-sd-card

System_Info_Linux.txt

$ cat /etc/*release*                                 # Check system version.
$ ls -ltrh /dev/video*                               # To list all video devices picked up by the kernel:
$ lsusb                                              # To list all devices attached to USB use:
$ lspci                                              # To list all devices attached to PCI use:
$ top                                                # Displays real time performance data of all running processes in a system. 
$ htop                                               # Like top but better.
$ cat > file_name.txt                                # Create a file from cat and write to it. CTR + C for closing it.

dpkg-reconfigure tzdata                              # Change the Local and Universal time on Rasberry.

$ cat tank_server_multithread_3.py                   # Open file to check.
$ ssh [email protected]                             # Connect with SSH client:
$ scp * [email protected]:~                           # Securely copy files from a device to another.
$ mv file.tar ./Doc                                  # Move files from a directory to another.
$ sudo sudo pkill mosquitto                          # Kill the service with the name or PID.

$ sudo lsof -i -P -n | grep LISTEN                   # Check open ports in the system.
$ sudo netstat -ap | grep 8484                       # Check the status of the port being used or not.
ping -I wlan0 time.google.com                        # Ping with defined network interface. 

$ CTRL + Z                                           # Shunts the process into the background, suspended.
$ CTRL + C                                           # Interrupt (kill) the current foreground process running in in the terminal.
$ CTRL + D                                           # Close the bash shell. Similat to exit. 
$ CTRL + L                                           # Clear the screen. This is similar to running the “clear” command.
$ CTRL + A or Home                                   # Go to the beginning of the line.
$ CTRL + E or End                                    # Go to the end of the line.
$ CTRL + ALT + UP or Down                            # Go to the other Workspace in Ubuntu.

If ubuntu locks up, try REISUB. It`s better than Cold Rebooting.
Holding ALT and PRINT_SCREEN press R E I S U B . Reboot Even If System Utterly Broken.
https://askubuntu.com/questions/4408/what-should-i-do-when-ubuntu-freezes


$ \time                                              #time option doesn't work
                                                     #time is not a builtin; I mean it's not treated as a command; it's a keyword. 
                                                     #That's why tricks like \time work.

$ \time -v python3 time_check.py                     #Display different times that the python script took to run.

$ python3 -mprofile time_check.py                    #Check python-script time performance.

#-------------Creating an Image from SD-card and vice-versa------------#

$ sudo fdisk -l                                      #Check SD-card name.
$ sudo umount /dev/mmcblk0p0                         #Unmount the SD-card partitions.
$ sudo dd if=/dev/mmcblk0 of=~/raspbian_backup.img   #Create an Image from an SD-card.
$ sudo dd if=~/raspbian_backup.img of=/dev/mmcblk0   #Copy the image to an SD-card.
$ sudo pishrink.sh raspbian_backup.img               #Shrink the Pi Image.  *First install pishrink*

Wondershaper.txt

The Wonder Shaper 1.4.1
https://github.com/magnific0/wondershaper

RTNETLINK answers: Invalid argument / We have an error talking to the kernel #17
https://github.com/magnific0/wondershaper/issues/17